M41T0 datasheet(4/20 Pages) STMICROELECTRONICS

部件名	M41T0

功能描述	SERIAL REAL-TIME CLOCK

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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M41T0

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SUMMARY DESCRIPTION

The M41T0 TIMEKEEPER® RAM is a low power

Serial TIMEKEEPER with a built-in 32.768kHz os-

cillator (external crystal controlled). Eight registers

are used for the clock/calendar function and are

configured in binary coded decimal (BCD) format.

Addresses and data are transferred serially via a

two-line bi-directional bus. The built-in address

register is incremented automatically after each

WRITE or READ data byte.

The M41T0 is supplied in 8 lead Plastic Small Out-

line package.

Figure 2. Logic Diagram

Figure 3. SOIC Connections

Note: 1. NF pin must be tied to VSS.

Table 1. Signal Names

Note: 1. NF pin must be tied to VSS.

AI07028

OSCI

VCC

M41T0

VSS

SCL

OSCO

SDA

OUT

1

SDA

VSS

SCL

OUT

OSCO

OSCI

VCC

NF

(1)

AI07029

M41T0

2

3

4

8

7

6

5

OSCI

Oscillator Input

OCSO

Oscillator Output

OUT

Output Driver (Open Drain)

SDA

Serial Data Address Input / Output

SCL

Serial Clock

NF(1)

No Function

VCC

Supply Voltage

VSS

Ground

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